Diagnosis: Keratoacanthoma
Description: Hemispherical nodule with central keratin-filled crater.
Morphology: Nodule,skin coloured
Site: Ankle
Sex: M
Age: 48
Type: Clinical
Submitted By: Nameer Al-Sudany
Differential DiagnosisHistory: Keratoacanthomas often undergo spontaneous resolution within a matter of months. However, some cases may persist longer as with the present case of calssical KA on the foot which has been present for three years. It was removed and sent for histopathological examination which was consistent with KA.